Why did cities grow in the early 1900s?

Cities grew in the early 1900s due to rapid industrialization, which created a surge in factory jobs that attracted rural populations and immigrants seeking better economic opportunities. Advances in transportation, such as the expansion of railroads and streetcars, facilitated movement and access to urban areas. Additionally, urban infrastructure improvements, including sanitation and public services, made city living more appealing. This period also saw a cultural shift towards urban lifestyles, as cities became centers of social and cultural activities.